<template>
  <div style="height: 100%; width: 100%; position: relative; z-index: 20">
    <Chart :cdata="cdata" style="height: 100%; width: 100%" />
  </div>
</template>

<script>
import Chart from './chart.vue';
export default {
  data() {
    return {
      cdata: {}
    };
  },
  components: {
    Chart
  },
  methods: {
    setData(data) {
      const arr = [];
      data.forEach((item, index) => {
        const obj = {
          name: item.street,
          value: Number(item.value),
          itemStyle: {
            opacity: 1,
            color: item.color
          },
          emphasis: {
            disabled: true
          },
          label: {
            show: false,
            lineHeight: 10,
            formatter: [
              '{a|{c}} {d|亿元}', // 引导线上面文字
              '{b|}',
              '{p|{b}}'
              // 引导线下面文字
            ].join('\n'), // 用\n来换行
            rich: {
              a: {
                padding: [-20, 0, -20, 0],
                fontSize: 18,
                color: '#fff',
                textShadowColor: '#1c90a6',
                textShadowOffsetX: 0,
                textShadowOffsetY: 2,
                textShadowBlur: 5
              },
              b: {
                height: 5,
                width: 5,
                padding: [0, -5],
                borderRadius: 5,
                backgroundColor: new this.$echarts.graphic.LinearGradient(0, 0, 1, 1, [
                  { offset: 0, color: '#FFFFFF' },
                  { offset: 1, color: '#3475DB' }
                ]),
                shadowColor: '#175CC9',
                shadowBlur: 8
              },
              p: {
                padding: [0, 0, 0, 0],
                color: '#D0DEEE',
                fontSize: 12,
                lineHeight: 17
              },
              d: {
                color: '#fff',
                lineHeight: 17,
                align: 'left',
                fontSize: 12,
                padding: [-20, 0, -20, 0]
              }
            }
          },
          labelLine: {
            show: false
          }
        };
        arr.push(obj);
      });
      const series = this.getPie3D(data, 0.7); // 可做为调整内环大小 0为实心圆饼图，大于0 小于1 为圆环
      // 准备待返回的配置项，把准备好的 legendData、series 传入。
      const option = {
        legend: {
          show: false
        },
        animation: true,
        tooltip: {
          show: false,
          textStyle: {
            fontSize: 14
          }
        },
        labelLine: {
          show: true,
          lineStyle: {
            color: '#7BC0CB'
          },
          normal: {
            show: false,
            length: 10,
            length2: 10
          }
        },
        label: {
          show: true,
          position: 'outside',
          // formatter: "{b} {d}%",
          formatter: (optionsData) => {
            console.log('optionsData', optionsData);
            return (
              '{name|' + optionsData.name + '}' + ' {value|' + optionsData.percent.toFixed(0) + '%}'
            );
          },
          rich: {
            name: {
              fontSize: 14,
              color: '#ffffff'
            },
            value: {
              fontSize: 14,
              color: '#ffffff'
            }
          },
          textStyle: {
            color: '#fff',
            fontSize: '14px'
          }
        },
        xAxis3D: {
          min: -1,
          max: 1
        },
        yAxis3D: {
          min: -1,
          max: 1
        },
        zAxis3D: {
          min: -1,
          max: 1
        },
        grid3D: {
          show: false,
          boxHeight: 2, // 圆环的高度
          top: '0%',
          left: '0%',
          // environment: "rgba(255,255,255,0)",
          viewControl: {
            distance: 120, // 调整视角到主体的距离，类似调整zoom
            alpha: 50, // 角度
            beta: 0,
            rotateSensitivity: 0, // 设置为0无法旋转
            zoomSensitivity: 0, // 设置为0无法缩放
            panSensitivity: 0, // 设置为0无法平移
            autoRotate: false // 自动旋转
          }
        },
        series
      };
      this.cdata = option;
    },
    getParametricEquation(startRatio, endRatio, isSelected, isHovered, k, height, i) {
      // 计算
      const midRatio = (startRatio + endRatio) / 2;

      const startRadian = startRatio * Math.PI * 2;
      const endRadian = endRatio * Math.PI * 2;
      const midRadian = midRatio * Math.PI * 2;

      // 如果只有一个扇形，则不实现选中效果。
      if (startRatio === 0 && endRatio === 1) {
        isSelected = false;
      }

      // 通过扇形内径/外径的值，换算出辅助参数 k（默认值 1/3）
      k = typeof k !== 'undefined' ? k : 1 / 3;

      // 计算选中效果分别在 x 轴、y 轴方向上的位移（未选中，则位移均为 0）
      const offsetX = isSelected ? Math.cos(midRadian) * 0.1 : 0;
      const offsetY = isSelected ? Math.sin(midRadian) * 0.1 : 0;

      const ellipseXRadius = 1; // x 轴半径
      const ellipseYRadius = 0.5; // y 轴半径

      // const offsetZ = i == 1 ? 2 : 0;
      // 计算高亮效果的放大比例（未高亮，则比例为 1）
      const hoverRate = isHovered ? 1.05 : 1;

      // 返回曲面参数方程
      return {
        u: {
          min: -Math.PI,
          max: Math.PI * 3,
          step: Math.PI / 32
        },

        v: {
          min: 0,
          max: Math.PI * 2,
          step: Math.PI / 20
        },

        x: (u, v) => {
          if (u < startRadian) {
            return offsetX + ellipseXRadius * Math.cos(startRadian) * (1 + Math.cos(v) * k) * hoverRate;
          }
          if (u > endRadian) {
            return offsetX + ellipseXRadius * Math.cos(endRadian) * (1 + Math.cos(v) * k) * hoverRate;
          }
          return offsetX + ellipseXRadius * Math.cos(u) * (1 + Math.cos(v) * k) * hoverRate;
        },

        y: (u, v) => {
          if (u < startRadian) {
            return offsetY + ellipseYRadius * Math.sin(startRadian) * (1 + Math.cos(v) * k) * hoverRate;
          }
          if (u > endRadian) {
            return offsetY + ellipseYRadius * Math.sin(endRadian) * (1 + Math.cos(v) * k) * hoverRate;
          }
          return offsetY + ellipseYRadius * Math.sin(u) * (1 + Math.cos(v) * k) * hoverRate;
        },

        z: (u, v) => {
          if (u < -Math.PI * 0.5) {
            return Math.sin(u);
          }
          if (u > Math.PI * 2.5) {
            return Math.sin(u);
          }
          return Math.sin(v) > 0 ? 1 * height : -1;
        }
      };
    },
    getPie3D(pieData, internalDiameterRatio) {
      const series = [];
      let sumValue = 0;
      let startValue = 0;
      let endValue = 0;
      const legendData = [];
      const k =
        typeof internalDiameterRatio !== 'undefined'
          ? (1 - internalDiameterRatio) / (1 + internalDiameterRatio)
          : 1 / 3;

      // 为每一个饼图数据，生成一个 series-surface 配置
      for (let i = 0; i < pieData.length; i++) {
        sumValue += pieData[i].value;

        const seriesItem = {
          name: typeof pieData[i].name === 'undefined' ? `series${i}` : pieData[i].name,
          type: 'surface',
          parametric: true,
          wireframe: {
            show: false
          },
          pieData: pieData[i],
          pieStatus: {
            selected: false,
            hovered: false,
            k: k
          }
        };
        if (typeof pieData[i].itemStyle != 'undefined') {
          const itemStyle = {};

          // eslint-disable-next-line no-unused-expressions
          typeof pieData[i].itemStyle.color != 'undefined'
            ? (itemStyle.color = pieData[i].itemStyle.color)
            : null;
          // eslint-disable-next-line no-unused-expressions
          typeof pieData[i].itemStyle.opacity != 'undefined'
            ? (itemStyle.opacity = pieData[i].itemStyle.opacity)
            : null;

          seriesItem.itemStyle = itemStyle;
        }
        series.push(seriesItem);
      }

      // 使用上一次遍历时，计算出的数据和 sumValue，调用 getParametricEquation 函数，
      // 向每个 series-surface 传入不同的参数方程 series-surface.parametricEquation，也就是实现每一个扇形。
      for (let i = 0; i < series.length; i++) {
        endValue = startValue + series[i].pieData.value;
        series[i].pieData.startRatio = startValue / sumValue;
        series[i].pieData.endRatio = endValue / sumValue;
        series[i].parametricEquation = this.getParametricEquation(
          series[i].pieData.startRatio,
          series[i].pieData.endRatio,
          false,
          false,
          k,
          // 调整扇形高度
          5,
          i,
          series[i].pieData.value
        );

        startValue = endValue;

        legendData.push(series[i].name);
      }
      return series;
    },
    highLightByName(name) {
      const k = (1 - 0.72) / (1 + 0.72);
      for (let i = 0; i < this.cdata.series.length; i++) {
        if (this.cdata.series[i].name !== 'mouseoutSeries') {
          this.cdata.series[i].parametricEquation = this.getParametricEquation(
            this.cdata.series[i].pieData.startRatio,
            this.cdata.series[i].pieData.endRatio,
            false,
            false,
            k,
            // 调整扇形高度
            this.cdata.series[i].pieData.name === name ? 20 : 10,
            i,
            this.cdata.series[i].pieData.value
          );
        }
      }
    }
  }
};
</script>

<style lang="less" scoped></style>
